forked from Imagelibrary/binutils-gdb
0891970109
In a record session, when we move backward, GDB switches from normal execution to simulation. Moving forward again, the emulation continues until the end of the reverse history. When the end is reached, the execution stops, and a warning message is shown. This message has been modified to indicate that the forward emulation has reached the end, but the execution can continue as normal, and the recording will also continue. Before this patch, the warning message shown in that case was the same as in the reverse case. This meant that when the end of history was reached in either backward or forward emulation, the same message was displayed: "No more reverse-execution history." This message has changed for these two cases. Backward emulation: "Reached end of recorded history; stopping. Backward execution from here not possible." Forward emulation: "Reached end of recorded history; stopping. Following forward execution will be added to history." The reason for this change is that the initial message was deceiving, for the forward case, making the user believe that forward debugging could not continue. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31224 Reviewed-By: Markus T. Metzger <markus.t.metzger@intel.com> (btrace) Approved-By: Guinevere Larsen <blarsen@redhat.com>
265 lines
9.7 KiB
Plaintext
265 lines
9.7 KiB
Plaintext
# Copyright 2008-2024 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This file is part of the GDB testsuite.
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# This test tests the restoration of various kinds of machine state
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# to their original values with a process record log. We will execute
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# the program forward while it changes various types of data, and
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# then execute it backward to see if their values get restored.
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#
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# The types of machine state (data) that are tested are:
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# register variable
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# auto variable
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# function static variable
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# module static variable
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# module global variable
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#
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# TODO:
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# various, possibly including...
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# .bss variable, .data variable, ...
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# shared library variable
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# heap variable (pointer)...
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# overlay variables...
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# Test forward replay
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#
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# This test suitable only for process record-replay
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require supports_process_record
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standard_testfile machinestate.c ms1.c
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set precsave [standard_output_file machinestate.precsave]
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if { [prepare_for_testing "failed to prepare" $testfile \
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[list $srcfile $srcfile2]] } {
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return -1
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}
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set newline "\[\r\n\]+"
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set beginmain [gdb_get_line_number " begin main " $srcfile]
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set endmain [gdb_get_line_number " end main " $srcfile]
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# Test begins
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runto_main
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# Activate process record/replay
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gdb_test_no_output "record" "turn on process record"
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gdb_test "break $endmain" \
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"Breakpoint $decimal at .*$srcfile, line $endmain\." \
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"breakpoint at end of main"
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gdb_test "continue" "Breakpoint .* end main .*" "run to end of main"
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gdb_test "record save $precsave" \
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"Saved core file $precsave with execution log\." \
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"save process recfile"
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gdb_test "kill" "" "kill process, prepare to debug log file" \
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"Kill the program being debugged\\? \\(y or n\\) " "y"
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gdb_test "record restore $precsave" \
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"Restored records from core file .*" \
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"reload prec save file"
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# Proceed to end of main
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gdb_test "break $endmain" \
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"Breakpoint.* file .*$srcfile, line $endmain.*" \
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"break at end of main"
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gdb_test_multiple "continue" "go to end of main forward" {
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-re ".*Breakpoint $decimal,.*$srcfile:$endmain.*$gdb_prompt $" {
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pass "go to end of main forward"
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}
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-re -wrap "Reached end of recorded history.*Following forward.*" {
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pass "go to end of main forward"
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}
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}
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###
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###
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###
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# Now run backward to each of several points where data is changed.
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#
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# Module global variable, reverse
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with_test_prefix "module global variable, reverse" {
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set breakloc [gdb_get_line_number \
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"module_global_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
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gdb_test "print aglobal" " = 0" "module global reverse-breakpoint"
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gdb_test "step" " module global post-change .*"
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gdb_test "print aglobal" " = 1" "module global forward past bp"
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gdb_test "reverse-step" "$newline$breakloc.*"
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gdb_test "print aglobal" " = 0" "module global reverse-step to bp"
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}
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# Module static variable, reverse
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with_test_prefix "module static variable, reverse" {
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set breakloc [gdb_get_line_number \
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"module_static_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
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gdb_test "print astatic" " = 0" "module static reverse-breakpoint"
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gdb_test "step" " module static post-change .*"
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gdb_test "print astatic" " = 1" "module static forward"
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gdb_test "reverse-step" "$newline$breakloc.*"
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gdb_test "print astatic" " = 0" "module static reverse-step"
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}
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# Function static variable, reverse
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with_test_prefix "function static variable, reverse" {
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set breakloc [gdb_get_line_number \
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"function_static_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
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gdb_test "print a" " = 0" "function static reverse-breakpoint"
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gdb_test "step" " function static post-change .*"
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gdb_test "print a" " = 1" "function static forward"
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gdb_test "reverse-step" "$newline$breakloc.*"
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gdb_test "print a" " = 0" "function static reverse-step"
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}
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# Auto variable, reverse
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with_test_prefix "auto variable, reverse" {
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set breakloc [gdb_get_line_number \
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"auto_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
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gdb_test "print a" " = 0" "auto var reverse-breakpoint"
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gdb_test "step" " auto post-change .*"
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gdb_test "print a" " = 1" "auto var forward"
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gdb_test "reverse-step" "$newline$breakloc.*"
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gdb_test "print a" " = 0" "auto var reverse-step"
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}
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# Register variable, reverse
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with_test_prefix "register variable, reverse" {
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set breakloc [gdb_get_line_number \
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"register_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "reverse-continue" "$srcfile:$breakloc.*" "reverse to $breakloc"
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gdb_test "print a" " = 0" "register var reverse-breakpoint"
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gdb_test "step" " register post-change .*"
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gdb_test "print a" " = 1" \
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"register var step post-change, first time"
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gdb_test "reverse-step" "$newline$breakloc.*"
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gdb_test "print a" " = 0" "register var reverse step-to"
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}
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# Proceed to beginning of main
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gdb_test "tbreak $beginmain" ".*$srcfile, line $beginmain.*" \
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"tbreak at beginning of main"
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gdb_test "reverse-continue" ".*$srcfile:$beginmain.*" "reverse to main"
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# Now repeat tests while replaying forward.
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# Register variable, forward
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with_test_prefix "register variable, forward" {
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set breakloc [gdb_get_line_number \
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"register_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "continue" "$srcfile:$breakloc.*" "forward to $breakloc"
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gdb_test "print a" " = 0" "register var forward-breakpoint"
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gdb_test "reverse-step" "hide.*"
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gdb_test "step" "$newline$breakloc.*" "step, 1"
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gdb_test "print a" " = 0" "register var forward step-to"
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gdb_test "step" " register post-change .*" "step, 2"
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gdb_test "print a" " = 1" \
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"register var step post-change, second time"
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}
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# Auto variable, forward
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with_test_prefix "auto variable, forward" {
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set breakloc [gdb_get_line_number \
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"auto_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "continue" "$srcfile:$breakloc.*" "forward to $breakloc"
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gdb_test "print a" " = 0" "auto var forward-breakpoint"
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gdb_test "reverse-step" "hide.*"
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gdb_test "step" "$newline$breakloc.*" "step, 1"
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gdb_test "print a" " = 0" "auto var forward step-to"
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gdb_test "step" " auto post-change .*" "step, 2"
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gdb_test "print a" " = 1" "auto var step post-change"
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}
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# Function static variable, forward
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with_test_prefix "function static variable, forward" {
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set breakloc [gdb_get_line_number \
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"function_static_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "continue" "$srcfile:$breakloc.*" "forward to $breakloc"
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gdb_test "print a" " = 0" "function static forward-breakpoint"
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gdb_test "reverse-step" "hide.*"
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gdb_test "step" "$newline$breakloc.*" "step, 1"
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gdb_test "print a" " = 0" "function static forward step-to"
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gdb_test "step" " function static post-change .*" "step, 2"
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gdb_test "print a" " = 1" "function static step post-change"
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}
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# Module static variable, forward
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with_test_prefix "module static variable, forward" {
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set breakloc [gdb_get_line_number \
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"module_static_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "continue" "$srcfile:$breakloc.*" "forward to $breakloc"
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gdb_test "print astatic" " = 0" "module static forward-breakpoint"
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gdb_test "reverse-step" "hide.*"
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gdb_test "step" "$newline$breakloc.*" "step, 1"
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gdb_test "print astatic" " = 0" "module static forward step-to"
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gdb_test "step" " module static post-change .*" "step, 2"
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gdb_test "print astatic" " = 1" "module static step post-change"
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}
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# Module global variable, forward
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with_test_prefix "module global variable, forward" {
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set breakloc [gdb_get_line_number \
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"module_global_state: set breakpoint here" $srcfile]
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gdb_test "tbreak $breakloc" "$srcfile, line $breakloc.*"
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gdb_test "continue" "$srcfile:$breakloc.*" "forward to $breakloc"
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gdb_test "print aglobal" " = 0" "module global forward-breakpoint"
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gdb_test "reverse-step" "hide.*"
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gdb_test "step" "$newline$breakloc.*" "step, 1"
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gdb_test "print aglobal" " = 0" "module global forward step-to"
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gdb_test "step" " module global post-change .*" "step, 2"
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gdb_test "print aglobal" " = 1" "module global step post-change"
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}
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